CVE-2026-44459 json
Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()
published 6mo ago modified 14d ago also GHSA-hm8q-7f3q-5f36 , EUVD-2026-30038
- cvss
- 3.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, improper validation of the JWT NumericDate claims exp, nbf, and iat in hono/utils/jwt allows tokens with non-spec-compliant claim values to silently bypass time-based checks. This issue is not exploitable by an anonymous attacker; it only manifests when a malformed claim value reaches verify() — typically when the application itself issues such tokens, or when the signing key is otherwise under attacker control. This vulnerability is fixed in 4.12.18.
Patch / fix
- npm hono 4.12.18
- hono hono 4.12.18
Is CVE-2026-44459 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 3.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | hono | <4.12.18 |
4.12.18 |
Affected products
- honojs hono
Classification
- Weakness
-
- CWE-1284 Improper Validation of Specified Quantity in Input
References
-
github.com
/honojs/hono/security/advisories/GHSA-hm8q-7f3q-5f36
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-44459
advisory
-
github.com
/honojs/hono
package
Sources
- CVE List CVE-2026-44459
- GitHub Advisory GHSA-hm8q-7f3q-5f36
- NVD CVE-2026-44459
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